Envoy client may fake the header `x-envoy-original-path`

{
  "id": "8eb0c2897cbe11855a65e1abc3438e9f0d1d6b76e732843c31d0abe72271e6b9",
  "url": "https://osv.dev/vulnerability/CVE-2023-27487",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Envoy client may fake the header `x-envoy-original-path`",
    "summary": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the client may bypass JSON Web Token (JWT) checks and forge fake original paths. The header `x-envoy-original-path` should be an internal header, but Envoy does not remove this header from the request at the beginning of request processing when it is sent from an untrusted client. The faked header would then be used for trace logs and grpc logs, as well as used in the URL used for `jwt_authn` checks if the `jwt_authn` filter is used, and any other upstream use of the x-envoy-original-path header. Attackers may forge a trusted `x-envoy-original-path` header. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 have patches for this issue.",
    "evidence": "osv:CVE-2023-27487",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-27487",
      "aliases": [
        "BIT-envoy-2023-27487",
        "CVE-2023-27487",
        "GHSA-5375-pq35-hf2g"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/envoyproxy/envoy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6392d12242234948b15a0fecee629f9cf8b76cee"
                },
                {
                  "introduced": "ce49c7f65668a22b80d1e83c35d170741bb8d46a"
                },
                {
                  "fixed": "b2064ed660934383cece8c8d60393d5b0720ae4d"
                },
                {
                  "introduced": "15baf56003f33a07e0ab44f82f75a660040db438"
                },
                {
                  "fixed": "d3d04156c3b05f8b4532d44e602fdd1b430c64bb"
                },
                {
                  "introduced": "9184b84cd0dcb3a6c57eb44b177d91c70e1a0901"
                },
                {
                  "fixed": "e99d61c4596573fbea8b8a9def8b160e138a4018"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.22.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.23.0"
                      },
                      {
                        "fixed": "1.23.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.24.0"
                      },
                      {
                        "fixed": "1.24.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.25.0"
                      },
                      {
                        "fixed": "1.25.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.25.2",
            "v1.23.5",
            "v1.24.3",
            "v1.22.8",
            "v1.24.2",
            "v1.23.4",
            "v1.25.1",
            "v1.22.7",
            "v1.25.0",
            "v1.24.1",
            "v1.22.6",
            "v1.23.3",
            "v1.23.2",
            "v1.24.0",
            "v1.23.1",
            "v1.22.5",
            "v1.22.4",
            "v1.22.3",
            "v1.23.0",
            "v1.22.2",
            "v1.22.0",
            "v1.21.0",
            "v1.20.0",
            "v1.19.0",
            "v1.18.2",
            "v1.18.1",
            "v1.18.0",
            "v1.17.0",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.0",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-27487.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.915771297Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27487.json",
        "https://github.com/envoyproxy/envoy/security/advisories/GHSA-5375-pq35-hf2g",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-27487"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27487.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-27487",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502270,
  "published_at": "2023-04-04T15:42:34.33+00:00"
}